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- W2016860864 abstract "The present study using a murine model heavily infected with Schistosoma japonicum aimed to elucidate the pathogenesis of adverse effects of praziquantel treatment of schistosome-infected subjects. Inbred BALB/c mice were infected with S. japonicum (Yamanashi strain) before being treated with a single dose of praziquantel at 4 or 8 weeks p.i. All the mice treated at 8 weeks p.i. exhibited signs typical of systemic anaphylaxis until half of them died shortly after praziquantel administration. At autopsy, these mice exhibited remarkable intestinal alterations characterised by increased mucosal permeability, mucosal oedema and petechial haemorrhage, which are changes typical of immediate intestinal anaphylaxis. In these mice treated at 8 weeks p.i., degranulation of intestinal mast cells was frequently observed, which was particularly remarkable around S. japonicum eggs hatched as an effect of praziquantel. Furthermore, the plasma histamine concentration just after praziquantel treatment was much higher in mice at 8 weeks p.i. than that in uninfected mice or in S. japonicum-infected mice without drug treatment. In contrast, none of these intestinal changes was observed in untreated or uninfected control mice, or in mice administered praziquantel at 4 weeks p.i., in which worm pairs had just reached sexual maturation and begun egg-laying. The finding by ELISA that serum IgM and IgA levels specific to S. japonicum eggs decreased immediately after praziquantel treatment, together with the results of immunohistochemistry, revealed the sudden release of parasite antigens from the eggs hatched by praziquantel treatment. The results of this study demonstrate that adverse effects of praziquantel treatment of schistosomiasis characterised by abdominal signs depend on anaphylactic reactions due to parasite antigens, especially antigens from eggs hatched as an effect of praziquantel." @default.
- W2016860864 created "2016-06-24" @default.
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- W2016860864 date "2002-04-01" @default.
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- W2016860864 title "Adverse effects of praziquantel treatment of Schistosoma japonicum infection: involvement of host anaphylactic reactions induced by parasite antigen release" @default.
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- W2016860864 doi "https://doi.org/10.1016/s0020-7519(01)00368-x" @default.
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